PuTTY bug fatal-errors

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summary: Fatal error handling is patchy and flaky.
class: bug: This is clearly an actual problem we want fixed.
difficulty: tricky: Needs many tuits.
priority: medium: This should be fixed one day.

Fatal error handling is patchy and flaky. It's very easy to throw a fatal error, put up a message box, and then receive a Windows message containing yet more socket data. The MessageBox message loop then dispatches that message automatically and the back end is called reentrantly. Chaos ensues. Solution: the fatal error behaviour should be much more robust. Close all sockets the instant a fatal error occurs; also set some global flags that prevent action messages from having any back end effect.

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(last revision of this bug record was at 2004-11-16 15:27:00 +0000)